package com.bbj.ch4_abstract.demo2;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: jack_yang
 * @Date: 2024/4/29
 * @Description: addition and subtraction
 */
public class MainTest {

    public static void main(String[] args) {
        Student student = new StudentChild();
        student.write();
    }
}
